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The Traitor King (10 player)
Kill 25 Swarm Scarabs within 30 seconds in 10-player mode.
The Traitor King (10 player) is a 10-point achievement earned by killing 25 Swarm Scarabs within 30 seconds during the Anub'arak encounter.
Enter Trial of the Crusader
Enter the Trial of the Crusader raid and engage Anub'arak. The achievement requires killing 25 Swarm Scarabs within 30 seconds, so you must allow scarabs to accumulate across multiple submerge phases rather than killing them immediately.
Manage Submerge Phases
Each time Anub'arak submerges, 12 Swarm Scarabs spawn. Kill the Nerubian Burrowers that appear but leave the Swarm Scarabs alive. After 3 submerge phases you will have accumulated enough scarabs — you may kill up to 11 early if needed, since 3 submerges provide 36 total.
Burst 25 Scarabs Together
Once you have at least 25 Swarm Scarabs grouped together, use area-of-effect abilities to kill 25 of them within the 30-second window to complete the achievement. Avoid equipping gear with multistrike effects, as unintended kills can reduce your available scarab count before you are ready.
Tips
See the video guide for a visual walkthrough of the scarab management strategy.
This achievement was previously tuned to require 40 kills but was reduced to 25, making the current threshold more achievable.